Vehicle bogie construction



sept. 24, 1935. H. W; JONKHOFF 2,015,311

VEHICLE BOGIE CONSTRUCTIO N Filed Aug. 28. 1934 2 Sheets-Sheet l Sept. 24, 1935. H. w. JoNKHoF 2,015,311

' VEHICLE BOGIE CONSTRUCTION Filed Alg. 28, 1934 2 Sheets-Sheet 2 A LNNYNNJ Patented sept. 24, l1935 UNITED STATES PATENT OFFICE VEHICLE BOGIE- CONSTRUCTION Henri Wouter Jonkho, Dusseldorf, Germany Application August 28, 1934 Serial No. 741,858 10 Claims. (Cl. 280-81) It is known to build double-axled bogies having four wheels each carried by, a longitudinal arm, the said arms extending in pairs oppositely disposed, pivotally connected to the bogie body, the

vertical movements of said opposite pairs of arms being controlled by a rockable laminated semielliptic spring, having its pivot on the bogie.

The present invention relates to a simpler cony struction of such bogies, and enables an economy in the material necessary in building such fourwheeled bogies, besides resulting in improved perfomance. In place of four wheel carrying arms only three are used, and in place of two semielliptic springs only one, or in effect only one, quarter-elliptic spring is used to control the movements of the three wheel carrying arms in such a way that all the four wheels are sprung independently.

In the invention the bogie body has generally an inverted U form, the closed part carrying on top a king pin and bearings to connect it pivotally to the vehicle chassis. The two depending arms of the U-body are interconnected by means of a cross pin carrying the bearings for three wheel carrying arms extending outwardly and longitudinally one in the forward and two in the opposite direction. The single arm carries at its free end a vertical bearing for an intermediary member carrying the pivots for two rockable cross members each carrying the pivots for an axle plate for the two wheels in such a way that the twowheels forming part of a parallelogram, are not only free to move vertically, independently of each other, but moreover can 'be steered by means of a'steering lever connected to said interl ediary member, which is free to swivel in regard to the wheel carrying arm. I'he steering lever is connected to said member pivotally in such a wa'y that-although its free end is not involved in the vertical movements of said member, still the horizontal movements of both members are always the' same.

An embodiment of the invention will be described in greaterdetail, by way of example,

" with reference to the accompanying drawings4 wherein:-

Figure 1 is a longitudinal view'of the bogie; Figure 2 is a sectional plan view with the rear wheel-carrying arms broken away to show the quarter-elliptic spring. The latter is shown longitudinally split into two equal parts which always move together lconstituting, therefore, for all Consequently, while the load is yieldably suppractical purposes, a single spring; v

Figure 3 is a view showing the rear wheelcarrying arms (which are omitted in Figure 2) wheels (on the left of Figures 1 and 2);

Figure 5 is a rear view offv the two rear wheels (illustrating a geared connection hereinafter described) and 5 Figure 6 is a. diagram showing how a vehicle body is mounted at one end on a pair of bogies disposed side by side.

Referring'to the drawings in detail, A designates the bogie body which is of inverted U-shape 10 and which supports, through bearings 2, the vehicle platform or chassis designated as C, the said platform or chassis C being pivotally mounted on the body A as indicated at I.

The two depending side portions or legs 3 of the 15 body A are connected together by a horizontally disposed cross pin 4, and on said cross pin is mounted, for vertical swinging movement, a single forwardly extending steering wheel carrying arm 5 and a pair of rearwardly extending rear wheel 2o carrying arms 6 and 6. In this connection it will be observed by reference to Fig. 2 that the steering wheel carrying arm 5 has three spaced bearings, 1, 8 and.9, on the cross pin 4; that the legs 3 of the body A bear on said pin adjacent to 25 pin between one of the legs 3 of the body A and the middle bearing 8 of the arm 5, and that the arm 6 has a bearing 6b on 'said pin between the 30 other of the legs 3 of the body A and said middle bearing 8 of the arm 5. It will further be observed that the arm 5 extends rearwardly beyond the cross pin 4, as indicated at 5, and that on its rearward extension 5h1 are mounted the for- 35 ward ends of a pair of quarter-elliptical laminated springs I0, I0 which, to all intents and purposes, may be considered as a single spring.

The arms 6, 6 overlie the spring or -springs Il) and near their rear ends have mounted there- 40 on, respectively, the two rear bogie wheels W. In addition, each arm 6, 6' carries near its rear end an inwardly facing gear segment I2, said gear segments being spaced apart and` having interposed therebetween a pinion I3 which is 45 carried by a member I4 on which rests the rear end or `ends of the spring or springs I0. Any load imposed on the bogie body A thus is trans- Y 4rnitted yieldably to the wheels W through the ported upon the wheels W, the latter obviously are free to move vertically relative to each other 55 lillA 1in passing over uneven surfaces as illustrated in Fig. 5. In this connection, in order to maintain the arms 6, S' parallel, thus to assure constant engagement of the pinion I3 with the segments -I2 and a constant spaced apart relationship of the wheels W, the i, t' preferably are provided with interiitting, relatively slidable formations II asi/illustrated in Fig; 3.

On they axle 23 of each wheel W is a worm wheel '24/ which is in mesh with a related worm 25 on a yrelated shaft 284 suitably journaled on the related wheel carrying arm, while on each wheel carrying arm 6,6 is a platform formation 21 on which is mounted a motor 2l which is connected with the related worm wheel shaft 26 to drive the saine:` 'I'here is thus provided a constant individual drive for each wheel W.

IAt the forward 'end-of the arm 5 is a vertically disposed Abearing 29 in which is rotatably mounted a vertically disposed pin 30 which extends above and below said bearing and which carries, above and below said bearing,- a pair of horizontally disposed, forwardly and rearwardly extendingvpivot pins 3i and 32, respectively. Yokes 23 land 34 are intermediately pivoted on the pins 3l and 32, respectively,` and related ends of said yokes are connected together by links or plates 35 on which are mounted the front steering wheels W', W', respectively. Said wheels thus are connected together by a parallelogram structure comprising the pivoted yokes 33 and 34, and the links or plates 35 so that any upward movement of either of said wheels relative to the arm I imparts an equal amount of downward movement of the other wheel relative to said arm. Inxother words, the wheels W', W are free to move vertically relative to` feach other, one under the control of the other, and at the same time, due to the mounting of the parallelogram structure on the pin 30, the wheels are free to be rotated in a horizontal plane relative to the arm 5 for steering purposes. In this latter 'connectionit willbe observed that the upper end portion of the pin I0 is in the form of a hollow housing having side walls in which are mounted the ends of a cross pin 2|, and that on said cross pin is rockably mounted a forwardly and rearwardly extending tube 22 in which is slidably, extensibhr mounteda steering rod 20, ythis arrangement providing for constant horizontal disposition of the steering rod .as is apparent.

Reference to Figure 6 will show that the invention may be applied to vehicles having two bogies arranged side by side under the vehicle chassis in such a way that four wheels are placed in a transverse row, all being free tor move with v their bogies under the vehicle chassis, and each pair of bogies may be interconnected so as to keep them parallel to each other under all circumstances. Moreover the four front wheels are steerable in pairs on different angles and the four rear wheels are each driven by a separate motor each of which is bound to move vertically with the arm 6* or 6b carrying said driven wheel as is shown in Figure i, the motor being fastened to an extension over the cross pin 4, which simplitles the transmision between the motor and the driven wheel.

I claim:-

1. A four-wheeled,bogie construction comprising in combination a bogie body, a forwardly extending arm and a p'air of independent rearwardly extending arms pivoted on said body, a 5 pair of steering wheels mounted on the forwardly extending arm, and a wheel mounted on each of the rearwardly extending arms, a balancing device movably connected between the rearwardly extending arms and a quarter-elliptic laminated spring fixed to and' between the forwardly extending arm and the balancing device.

2. A four-wheeled bogie construction according to claim l wherein the bogie body is provided with a cross pin, and the single forwardly extending 15 arm and the pair of rearwardly extending arms have their bearings on this common cross pin.

3. A four-wheeled bogie construction according to claim 1 in which the pair of rearwardly extending arms extend beyond and overlap the axles of the wheels carried by arid the springcarrying balancing device is connected between the overlapping ends of the said arms.

4. A four-wheeled bogie construction according to claim 1 in which the spring-carrying balancing 25 device is furnished with a pinion, and the rearwardly extending arms are each furnished with a geared segment meshing with said pinion.

5. A bogie comprising a body rotatable about a vertical axis, a single arm extending forwardly 30 from said body and pivoted thereto for vertical swinging movements, a pair of arms extending rearwardly from said body and pivoted thereto for vertical swinging movements, spring means between said arms resisting upward swinging 35 movements thereof, a wheel mounted on each rearwardly extending arm, and a pair of wheels mounted on said forwardly extending arm for angular steering movements.

-6. A bogie as set forth in claim 5 in which the 40 pair of front wheels are mounted on the forwardly extending arm for angular steering movements about a vertical pivot intersecting the longitudinal axis of said arm.

7. A bogie as set forth in claim 5 in which the 45 spring means between the arms comprises a quarter-elliptical spring fastened at its forward end to the forwardly extending arm and opera.- tively connected at its rear end to the rearwardly extending arms.

8. A bogie as set forth in claim 5 in which the spring means comprises a. pair of quarterelliptical springs both fastened at their forward ends to the forwardly extending arm and respectively connected at their rear ends to the rearwardly extending arms.

9. A bogie as set forth in claim 5 in which the forwardly and rearwardly extending arms have a common pivotal connection with the bogie body.

10. A bogie as set forth in claim 5 in which 1 4@ each rearwardly extending arm carries a rack, and in which the spring means carries a pinion interposed between said racks.

HENRI WOU'I'ER JONKHOFF.' .(5 

